Malicious PDF — malware analysis report

Static analysis result for SHA-256 292861ee979096ea…

MALICIOUS

PDF

85.6 KB Created: 2021-09-11 12:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d11ec749551d074cdf930523df9011e4 SHA-1: 84ab89dde7735534d22c5846b65ec37edc553e89 SHA-256: 292861ee979096eaa20030ba650444398dbaa5b7ffc6ffe6c8e8ef3089316431
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://rustproofingottawa.com/userfiles/file/62900414666.pdf In PDF document text
    • https://cooperspick.com/files/lizujelamuli.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/13428882028.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1695a5fd6---51682567503.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/kuraxekaxobizogobeju.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/feladuparijuto.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/49621984366.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/nejejiz.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/xamemu.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139c35a101b6---48777359653.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/35240870908.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/kevasawasurafobugesijit.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/11e7abd26d2172ed860e5f9aa55437bc/kedelepotisi.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/27329388516.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/35080727691.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/4785816756.pdfIn PDF document text
    • https://langumeistras.lt/i/File/vevevejov.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/46213271758.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/30458193006.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/wabizebevaduzek.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/mefaxafomufalagosupagape.pdfIn PDF document text
    • https://healthtecindia.com/userfiles/file/21716980746.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/47531709556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pubg+india+mbPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 21128 bytes
SHA-256: b6faae412da3f8d94b34055351e88ca01b1c6313800139003de41f8ce0133adc
font_01_sfnt_off00011a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2E 10168 bytes
SHA-256: d085d2729dd3f0f05b4150b2e73502d44e3704682ce6f098414cfa37211170db
font_02_sfnt_off00013095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1